Evaluation of Efficacy of Anionic Surfactant Degradation in the Presence of Concomitant Impurities of Natural Waters

Table 4

Reduction of ABS concentration in the course of oxidation of its solutions in natural waters by various methods.

Object of research	Oxidation method	𝑡, min	𝑣oz, mg/(dm^3·min)	𝐶ABS, mg/dm^3		Δ𝐶ABS, %		𝐷oz/Δ𝐶ABS,
				EPh	SPh	EPh	SPh	mg/mg
Solution of ABS in Desna River water	—	0	—	4.97	—	—	—	—
	O3/UV	20	0.9	1.43	—	71	—	3.3
	O3/TiO2/UV		0.9	0.29	—	94	—	2.8
	O2/TiO2/UV		—	0.68	—	86	—	—
Solution of ABS in Dnieper River water	—	0	—	4.90	4.95	—	—	—
	O3		1.6	3.60	3.65	27	26	19.1
	O3/UV	30	1.3	0.85	0.90	83	82	5.5
	O3/TiO2/UV		1.3	0.26	0.26	95	95	5.3
	O2/TiO2/UV		—	0.55	0.60	89	88	—
	O2/UV		—	3.25	3.10	37	39	—

Note: Initial ABS concentration—5 mg/dm³, 𝑇 = 20 ± 1°C.